Ikke-kodende DNA: Forskelle mellem versioner
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[[File:Components of the Human Genome.jpg|thumb|right|Illustration af forholdet mellem det humane genoms forskellige komponenter]]
I [[molekylærbiologi]] er '''junk-DNA''' eller '''nonsens-DNA''' en samlet benævnelse for [[kromosom]]ers eller [[genom]]ers [[DNA]]-sekvenser, som ikke har en kendt funktion. Op imod 97 % af den [[menneske]]lige genom er blevet klassificeret som "junk" – eller på dansk affald.▼
▲I [[molekylærbiologi]] er '''junk-DNA''' eller '''nonsens-DNA''' en samlet benævnelse for [[kromosom]]ers eller [[genom]]ers [[DNA]]-sekvenser, som ikke har en kendt funktion. Op imod 97 % af den [[menneske]]lige [[genom]] er blevet
Selvom det meste af junk-DNA sekvenser formodes at være [[evolutionær]]e [[artefakt]]er, som ikke har noget aktuelt formål, tror nogle at junk-DNA fungerer på måder, vi endnu ikke kender betydningen af.
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<ref>[http://www.sciam.com/article.cfm?chanID=sa006&colID=1&articleID=00045BB6-5D49-1150-902F83414B7F4945 October 2004, Scientific american: The Hidden Genetic Program of Complex Organisms] Citat: "...But an overlooked regulatory system based on RNA may hold the keys to development and evolution..."</ref>
<ref>[http://www.sciencedaily.com/releases/2007/04/070423185538.htm April 24, 2007, Sciencedaily: 'Junk' DNA Now Looks Like Powerful Regulator, Scientists Find] Citat: "...Many of those snippets were located in gene-free chromosomal expanses once described by geneticists as "gene deserts." These sections are, in fact, so clogged with useful DNA bits – including the ones Bejerano and his colleagues describe – that they've been renamed "regulatory jungles."...transposons that duplicate themselves and hop around the genome. "We used to think they were mostly messing things up. Here is a case where they are actually useful," Bejerano said..."Now we've shown that transposons may be a major vehicle for evolutionary novelty," he said...."</ref>
== Se også ==
* [[Allel]]
* [[DNA]]
* [[DNA-sekventering]]
* [[Genteknologi]]
* [[Konsensussekvens]]
* [[Nordisk Genbank]]
* [[Restriktionsenzym]]
* [[Shine-Dalgarno-sekvensen]]
== Kilder/referencer ==
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